# iBGP Local-AS Route Propagation

DevFeed: [iBGP Local-AS Route Propagation](<https://devfeed.tech/articles/ibgp-local-as-route-propagation-11227.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/08/ibgp-local-as-rr/>)

Published: 2025-08-29T05:52:00Z

Content type: tutorial

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [BGP](<https://devfeed.tech/topics/bgp.md>), [Network](<https://devfeed.tech/topics/network.md>), [configuration](<https://devfeed.tech/topics/configuration.md>)

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [network](<https://devfeed.tech/tags/network.md>), [router](<https://devfeed.tech/tags/router.md>)

## AI overview

This article examines iBGP local-AS route propagation using an FRRouting lab topology. It explains why routes between real and local-as iBGP sessions must be reflected and why next-hop-self must be applied to EBGP and reflected iBGP routes.

## Source excerpt

In the previous blog post on this topic, I described the iBGP local-as functionality and explained why we MUST change the BGP next hop on the routes sent over the fake iBGP session (TL&DR: because we're not running IGP across that link). That blog post used a simple topology with three routers. Now let's add a few more routers to the mix and see what happens. Read more ...